Illustrations, detail drawings and accompanying descriptions describe standard features and sometimes optional variations of each product. They do not necessarily show or describe all the variations available. All designs are subject to change without notice and unless stated in the order, material will be furnished of design in effect at the time the order is filled. As may be necessary, we reserve the right to substitute materials and/or to make changes in design or other specification, as shown and described in any of our printed literature, without liability to purchasers.